Combine two integers to create a unique number

Question

Good Morning,

I was looking for a way to combine two integers to create a unique number, I have two tables that I need to combine into a third table with unique numb

Answer 1

If SchoolID is always a 3 digit number multiply ClassId by 1000 then add SchoolID.

Your number might "overflow" though., and given the ones you have if they are 32-bit they will.